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C#7 Chord on Guitar, Piano and Ukelele [C# Dominant 7th Chord] How to Play the C sharp

Última actualización el 3 de January de 2023 por Sergio J. C.

The C# dominant 7th chord (C#7) is built from a root note (C#), a major third (E#), a perfect fifth (G#) and a minor seventh (B):

  • Type: major tetrad.
  • Formule: 1 3 5 ♭7.
  • Music notes: C# (1) E# (3) G# (5) B (♭7).
  • Chords to play with: IVmaj7 (F#maj7) y V7 (G#m7).
C#7 chord pentagram staff stave

C#7 chord [Musical explanation]

The C# dominant seventh chord is a tetrad with formula 1 – 3 – 5 – ♭7. Therefore, to build it we need C# (1), E# (3), G# (5) and B (♭7):

what notes are in the C#7 chord

This is due to the fact that a dominant seventh chord is made up of 3 third intervals:

  • A major interval (4 half steps between the 3rd and root).
  • A minor interval (3 half steps between the 5th and 3rd).
  • A minor interval (3 half steps between the 7th and 5th).

If we apply this principle to the C#7 chord we obtain that:

  • E# is the major third of C# because it is 4 half steps above the root.
  • G# is the perfect fifth of C# because it is 3 half steps above the 3rd.
  • B is the major seventh of C# because it is 3 half steps above the 5th.

Thus, this confirms that a major seventh chord is defined by:

Root (C#) – Major Third (E#) – Perfect Fifth (G#) – Minor Seventh (B)

To sum up, in order to build the C#7 chord we need to add the minor seventh (7th) to the C# major chord.

C#7 Guitar Chord

The C#7 chord guitar has the following shape on the fretboard:

C#7 guitar chord
C#7 guitar diagram

Let’s analyze in detail this chord diagram above to make sure that we understand how to play the C#7 on guitar. We will start by analyzing the 4 circles in blue, which indicate that on the strings 4 (D) and 2 (B) we have to place the fingers 2 (middle) and 4 (pinky). In this case we have a barre chord, so we have to use as well the index finger (1) to press down the strings from 5 to 1.

Note by the way the number 4 in black on the left that indicates on which fret we start playing the chord.

On the other hand, at the top we see that we have the characters:

C#  E#  B  C#  E#

This simply means that in the:

  • Sixth string there is no sound.
  • Fifth string sounds the C# note.
  • Fourth string sounds the E# note.
  • Third string sounds the B note.
  • Second string sounds the C# note.
  • First string sounds the E# note.

And at the bottom we find the numbers:

1  5  ♭7  3 5

This indicates that in the:

  • Sixth string There is no number because there is no sound.
  • Fifth string sounds the root (1).
  • Fourth string sounds the perfect fifth (5).
  • Third string sounds the minor seveth (♭7).
  • Second string sounds the major third (3).
  • First string sounds the perfect fifth (5).

⚠️ Important: it is not mandatory to memorize all this information to play the C#7 chord on guitar. But it is highly recommended to know it in order to understand the musical theory behind each chord.

Other ways to play the C# dominant 7 guitar chord

In addition to the diagram shown at the beginning of the article, we can also find the C#7 chord in the following fretboard positions:

C#7 chord guitar chart
C#7 chord guitar chart

C#7 chord inversions

The 3 inversions of the C 7th chord are:

  • First inversion: C#7/E#.
  • Second inversion: C#7/G#.
  • Third inversion: C#7/B.
C#7 guitar chord inversion
C#7 chord guitar chart

C#7 Ukulele Chord

Here you can see as well the C#7 uke chord diagram:

C#7 ukulele chord
C#7 on ukulele

C#7 Piano Chord

To play the C#7 chord on piano we only need to find the same music notes on its keys:

C#7 piano chord
C#7 piano

First Inversion (C#7/E#)

C#7 piano chord third inversion C#7E#

Second Inversión (C#7/G#)

C#7 piano chord second inversion C#7G#

Third Inversión (C#7/B)

C#7 piano chord first inversion C#7B

Music scales in which the C# minor 7th chord can be found

  • F# major scale (armonizada por cuatríadas)
    • F#maj7 G#m7 A#m7 Bmaj7 C#7 D#m7 E#m7♭5
  • D# natural minor scale (armonizada por cuatríadas)
    • D#m7 E#m7♭5 F#maj7 G#m7 A#m7 Bmaj7 C#7
  • F# harmonic minor scale (armonizada por cuatríadas)
    • F#m(maj7) G#m7♭5 Amaj7#5 Bm7 C#7 Dmaj7 E#dim7
  • G# melodic minor scale (armonizada por cuatríadas)
    • G#m(maj7) A#m7 Bmaj7#5 C#7 D#7 E#dim7 Gm7♭5
  • F# melodic minor scale (armonizada por cuatríadas)
    • F#m(maj7) G#m7 Amaj7#5 B7 C#7 D#dim7 E#m7♭5

C#7 Chord PDF

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